This was a service call on a Captive Aire hood system that wouldn't turn off. I found that the system was never hooked up right from the original install, I repaired the problem and all is good now.
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The complaint today is is that the exhaust fans won't shut off as they come in in the morning. The switches are off, but they're always running we're gon na check it out and see what we can find. So we don't want to mess with the fire suppression system, but up here on, the right is our hood control panel. These power switches right here should be connected into there somewhere all right.
So what we have here is a captive air hood control panel. Okay, this is located in the side of an exhaust hood. The complaint is, is that the exhaust fans are never shutting off and turn off the power switch and they continue to run okay. This particular system has, in a nutshell, it's calm, a temperature controlling device.
So we are reading duct temperature of 71 degrees and temperature controller set point of 85 and what they do is if the temperature ever gets above 85, regardless of whether the hood switch is on it turns the exhaust fans on. But you notice on this temperature controlling device. It says lll! Well, that's because it's not reading a temperature, so it's defaulting to run the exhaust fans. But if we go down here, you can see right here is our thermostat wire, it's an 18-3 gate or three conductor.
18 gauge thermostat wire and if we carefully move this, there's not one hooked up to the right one and I actually traced out the sensors in the exhaust ducts and there's never been one hooked up to this. So these exhaust fans have been running 24/7 for eight years go figure. This is the stuff we rented to someone never properly commissioned this building and started this system up correctly. So what we need to do now before I go and run a thermostat wire over to my other hood, to get us our control voltage our control sensor wires.
I got to test the sensors because I don't want to go through all that work to find out that we have bad sensors. Also, so I talked to the manufacturer and they basically told me what the own value should be at said temperature. So I'm gon na test that now the problem is, is getting to these sensors because they're very difficult to get to. So that's where we're at at this point everything else inside here.
This is just a typical motor starter cabinet. These are overload protected contactors. Essentially, we call them motor style, they used to be called mag starters, but this is just motor starters and what they do is they have a current sensing device on the bottom of it. You've got three-phase power coming in the top, and then it comes out.
The bottom, when the contactor pulls in well after that contactor pulls in this overload sensing device right here, monitors the amperage and if the amperage gets within you know, a certain gets to the set point. Basically it'll potentially shut off the motor before the motor burns. Up. That's the theory at least I mean they're there, basically to protect the motor motor protector.
You can call them to it. Yes, so basically, all those motor starters are being told to turn on by these temperature controlling devices, and you know they shouldn't be so currently. At this time I have all their exhaust fans shut off and all my exhaust fans are still running. It's just one of those things, so this is on top side of my exhaust hoods. Your sensor, that's the sensor, and the problem is that it's on the top of this hood and it's a nightmare begins in my dilemma. If that's my exhaust system, I got ta get up above the drop ceiling down on top of the hoods, because the hood ceiling is right. There, that's all just metal cladding around the hood, so it's like a nightmare to get out there. So I made it up on top of the hood, and this is the one there should be thermostat water coming into this, because this should be my hookup and there's nothing there.
So we're gon na open that up and test the existing sensor. The sensors are really pain in the butt to change, so we're gon na see if it's good or we may just have to order a sensor to just like. I thought it's never been hooked up since day, one so we're gon na strip it back and test it. I need to start carrying a Leatherman.
I got all the way up here and these wires weren't stripped and all I had was my pocketknife. If I had 11 minutes sure it would be nice on me, I forgot to bring up wire strippers cuz. I didn't know these wires, wouldn't be you know stripped at all, so this is just a thermostat wire, so I'm gon na secure it carefully with zip ties and I'm just running it. I'm using my fish stick pushing it over and then basically just gon na come down into here.
That's my control box down there I'll pop a hole in that and then we'll run this calm wire and get this thing wired up the sensors test it out. Okay, so it shouldn't be too difficult. Some are probably gon na criticize me for this, but what I'm doing is I'm just tying to the hanger strap for the drop ceiling, but the way I'm doing it is I'm tying a zip tie to a zip tie, and I don't know if you guys can See that and that's that way so that the wire doesn't touch the metal and it doesn't rub against the metal and you understand what I'm doing there and it's never gon na be super tight so that we have a little bit of free moving in case. You need to pull anything work on it again same thing right here, it's tied to the zip tie.
So that way, it's not rubbing against the wire. That way, we don't rub out on drop ceiling, thing and I'll secure it. On the other side too. Yes, I landed the three wires.
I'm gon na put the covers back on and clean up my mess, take the extra wire down and all that good stuff. All right, stopwhy right here, I haven't, ran all secured properly coming in here. Tuck it over here run it in there. We go we're landed on our thing and now we're reading temperature and the hood switch is off and the hood switches on sounds like they got.
A loose belt that'll be another day but um yeah. So now we're set up like we're supposed to be controlled by the hood switch. I would like to say that I think I want to talk to them about replacing this hood switch because it's kind of they popping out a little bit or something, but it's working for now, all right. So, to recap: we had a service call on an exhaust hood system. This was a captive air hood system that wasn't shutting off at nighttime when the customer turned the hood system off. Okay, when I arrived, what I found was that that was correct. All the power switches for the hood system were shut off when I arrived, and the hood system was running, I toggled through the power switches, confirmed that they weren't shutting it off and then also checked the power on the hood switches to make sure that it was Actually de-energizing across the switch, and it was what the actual problem was, was that the hood system had a temperature controlling safety device built into it. So that way, if the customer accidentally left cooking appliance on after they left and/or forgot to turn the hoods on altogether.
The hood system would automatically power itself on if the temperature inside the duct got above a certain threshold that particular temperature sensing device was not working correctly and the reason why was because the original installer of the hood system never properly commissioned it? And/Or started it up. There was no communication wire ran from the sensor in their grill hood, all the way over to the hood control panel, so they had to temperature sensing devices, one for their fryer hood and one for their grill hood. The fryer hood was hooked up correctly, but the grill hood wasn't so the system was defaulting as a safety precaution to running all the time. The interesting thing is is that this restaurant had been open for eight years and that temperature sensor had never been hooked up for eight years, so those exhaust fans had been running 24/7 365 very interesting, but this is the stuff we run into.
Sometimes you got to be an investigator. You got to step back and look and look at the problem, as I you guys saw in the video once I figured out what the problem was before. I ran that extra sensor wire. I jumped, on top of the hood, to confirm that the actual sensor was still good and it was so.
Therefore, I ran the sensor wire over and everything was working properly. Okay, as you guys saw, I was worried about the power switch because it was kind of popping out of its little housing. It's kind of hard to see in the video, but it just wasn't right and the customer approved me to go ahead and order that power switch. I have not returned to install it yet, but I will soon and that's pretty much it guys.
Okay, I want to say thank you very much for watching my videos right now popping up on the screen as some other channels that I recommend you guys check out, give those guys a subscription, I'm sure, they'd appreciate it. Leave them some feedback and leave me some feedback down in the comments. Ok, I really appreciate the emails and the correspondence you guys have been sending me on my Facebook page email in the comments of this video. It's really cool to see that you guys are liking. These videos and interested in what I have to say inside of them it's kind of humbling, actually to think that people are interested in what the silly stuff that I go through. You know and say, but I digress thanks a lot. Guys really appreciate it and we will see you guys on the next one: okay.
I do the zip-tie to zip-tie trick on airplanes 🤷♂️😂 Are you in Ottawa ?
Thank you
Can you help m
Maximum stupidity to see shit like this. No start up 8 years of wasted electricity.
Did they install on a Friday? Were they called Weary Willie and Tired Tim? 😜 Service area Kanata??
Never had a particular interest in AC systems. But I do like technical stuff. Thanks to the completely bonkers YouTube algorhythm I occasionally ran into videos about AC technics and got hooked on your stuff. Subscribed a few weeks back for a few reasons. One is that you're the most thorough technician I came across and you do a perfect job every time or at least, as close to perfect as one can get. On a sidenote: my bro-in-law does more or less the same job as you, just that he also does central heating burners, and he has to do exams every two years to catch-up with new and obsolete hardware and new or changed regulations. Is that something you have to do on a regular basis as well? All the best and greetings from Antwerp in Belgium.
Witch I guess the hood fan hase a capacitor I guess if it starts the hood fan
Wow your in a different location
I think every industry has it's cowboy installers who don't commission properly, probably because it's just hard work.
One great tip I have learnt from your channel is zip tying to zip tie. I don't care what industry you're in if it involves wires this is a great tip.
Mortal sin not to carry a pair of multitools. I cant exist without mine !
My dad is a hood tech he say it's impossible for a exhaust fan to run for 8 years without service and not changing the pulley the pulley would've been broke and even if the motor didn't have a pulley around the motor still would've died therefore this is a lie
I've only been at the job for a couple of years, but I'm a QC for this kind of product, and these videos are helpful to me. We only build the electrical packages in my area, so seeing the full unit running, and how everything works together, is an invaluable asset. A lot of the components have changed, but I could follow along and make sense of it with what I know. Thank you for sharing your experiences. You're making a difference. ^_^
Thanks, HVACR for the helpful video! How often should the motor` started cabinet's electrical components be checked and what usual maintenance is required for the electrical box innards themselves (Exp. how often should the overload protectors be checked/replace and for what reasons?). Thank you for the useful content! You rock, budd!
Installers are not "True Technicians". They slam, collect and run to the next one! Those of us that have to make things work for a living know the difference! I started laughing when you first said "we don't want to mess with the halon system"! To trigger one by mistake would ruin the restaurant! A service call that could end up costing a fortune! Service area Ottawa??
Nice job. That looks nasty with all the grease build up. What did you find when you returned to tighten the belts? Did you record it?
Great trouble shooting
Real impressive man good job you got good skills
I'll bet it was Installed on a Friday. (Eight years ago) In my line of work, I get pretty much the same all the time. Never Installed, Installed wrong, etc. Just last week I got a call for a UPS That did not come on when a power event happen. Come to find out the Installer never hooked up the neg side of battery when it was installed.
Here at chicago hotels,hospitals, schools and kitchens downtown below 50th floor needs to be on
Hey. Did you go through school for this or a apprenticeship, or ojt?
I have done this captive hood. the problem is the blower fan motor draws too much amps.Breaker trips at the contactor.
Wow thanks for the breakdown of the controls
I used to build these at captive aire
I'm in the middle of my second month of on-the-job training. If I'm not reading during the long drive between Austin and San Antonio, I'm watching your videos. Then watching them again. They are a massive help. Well explained. You know your shit. Thanks very much. Are you in Nepean ?
Love the trouble shooting keep it up, to many hacks making a bad name for us "true craftsman" cheers Are you in Orleans ?
Your hvacr video are one of best out there. Thank you for education
not as bad as the wires ground off the wall job but damn, 8 years no sensor?!
Please tell me they got this cleans by you too. That hood is a fire waiting to happen
8 years and they only just noticed lol
Nice 👍
lol
I'm a kitchen worker, and honestly, I would love to know the inside and out of HVAC for kitchen systems. I think it would definitely make me a little more valuable in the kitchen, and a second trade skill is always nice.
I know it happens all the time in our line of work but why … why would someone go to all the trouble of installing such a system and not finish it out 🙄 Service area Barrhaven??
Wow nice catch and fix bro. I used to work for a company doing hood cleaning and it was a dirty job hated it but it paid bills I let my boss know that I was going to quit to become an HVAC technician
How often as a breakdown technician finds stuff never installed / commissioned properly.
Nicely done there.
Well…
At least you know them motor starters are in great shape lol!
Good job. Thanks for sharing videos.
Nice repair video Are you in Barrhaven ?
Nice work brotha!👍🏼🤙🏼🤘🏼🔥
Power switch off
But because there is no temperature sensor
So will it go to safe mode and let the fan motor continue to run?
Good stuff, Brother!!!!
Great job, good finding and fix 👍🏻 Service area Nepean??
Great video, thumbs up👍
LOL!!!! How does this happen? My daughter just heard a "rattle" in my Navigator for the first time last week, that's been there for the past 3+years. Was all concerned, had to tell me about it ASAP, thought it might be urgent. How the hell does this happen?!!? Never ceases to amaze me……
I love your work, I'm not a HVAC guy by any means but your videos are informative and entertaining. Would like to see more of the work in progress but time constraints at the job site are understandable when you cant set up your camera in a busy kitchen. Keep up the great work.
That amazes me when there is an incomplete install…. There has to be wear on that system from running all that time. Thank you for the videos, these kinds of things really intrigue me.
As soon as I saw the title I knew what it would be. I bypassed the temp device on my own hood so it would only turn on when I pushed the switch to turn it on. No way I'm throwing dollars out the window on the electric bill. I bet this guy would love to have 8 years of lost money back. Mine are not digital like these they are analog and you have to turn the top of the probes to change the temp setting and they are in the same place on top of the hood and projecting into the duct.. The big issue I have with them aside from the electric waste was that it would cycle the hood motor on and off on and off until the temp was far enough one way or the other then it would shut the motor off or let it run. When you shut down at the end of the day you have quite a bit of residual heat from the cooking appliances so the probes would cool down with the motor running the fan and once it shut off would restart again as the heat built up again. I was worried about burning up the motor because of that so I just bypassed the temp switch altogether. I would say you need to monitor this and you may have to change the set point or this thing could do the same at then of their shift.
I liked this video, UNTIL the staring into the camera jolted me! Chris, you make me more nervous then a pig in a bacon factory
It's crappy that there are contractors in the world that miss this kind of stuff… Awesome you get the opportunity to be a badass and make money off those mistakes… Great job, man 🤙
What kind of ninja skills do you have to get above that hood.